modifier vs modifier gene

modifier and modifier gene both are nouns.

Word	Noun	Adjective	Verb	Adverb
modifier	Yes	No	No	No
modifier gene	Yes	No	No	No

As nouns, modifier and modifier gene are synonyms defined as:

modifier and modifier gene: a gene that modifies the effect produced by another gene

modifier (noun)	modifier gene (noun)
a gene that modifies the effect produced by another gene	a gene that modifies the effect produced by another gene
a content word that qualifies the meaning of a noun or verb
a person who changes something
a moderator who makes less extreme or uncompromising